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The ISIPP Accreditation Database is a DNS list of the domains and/or IP addresses of senders who either a) meet ISIPP's criteria as determined by background, reference, and other checks ("non-vouched listings"), or b) are personally known to ISIPP to meet the criteria and to be good Internet mailing citizens, and for whom we will thus vouch ("vouched listings").

Email receivers check the IADB in realtime, as they are receiving email from the sender, to determine such information as the sender's SPF status, the opt-in policies of the sender, and whether the sender participates in best practices organizations or is known to ISIPP as a "best practices sender".

How IADB Works

Presently the IADB is helping ISPs and spam filters make email acceptance, delivery, and processing decisions for more than 525million pieces of email per month, on behalf of more than 100million email boxes.

Receivers choose which information is important to them, and make email processing and acceptance decisions based on that information.

Senders listed in IADB report that once listed they experience very little in the way of delivery problems with most major ISPs, and that the listing helps with delivery into enterprise servers as a result of their enhanced credibility as an email sender.

The IADB is administered by ISIPP, widely respected and considered to be one of the most neutral organizations in the email sending and receiving industries. When we work with an ISP, spam filtering company or other email receiver, they know that the email coming from IADB accredited senders will be what we say it is.

Founded in 2003 and privately funded, ISIPP has no investors, venture capital firms, stockholders or other money stakeholders driving IADB accreditation, listing, or delisting decisions. ISIPP’s bottom line is your bottom line: we help legitimate mail get delivered, and spam to stay out. It takes good email practices, not money, to get a high rating in the IADB.

Because our service to the email sending and receiving communities is driven by our mission to further good email practices and stop spam, not to provide a return on investment, we happily offer our services to email senders and receivers of all sizes.

Listing in IADB is month-to-month. There is no long term commitment, and all of our costs are publicly available, right on our website.